Vision Change

has anyone else noticed that their vision has changed since becoming pregnant? a month before i conceived i just got my prescription updated and could see perfectly out of my glasses/contacts. i'm currently 30 weeks and the past 5-6 i have so much trouble seeing well. i can't even drive at night time now. i have to squint to see anything a few feet away. when i asked about it, my eye doctor said my vision may change during pregnancy, but i just want to know if this is actually normal and if it will go back to normal after i have our baby?